Piston-ring pliers.



' n.1. CAMPBELL.

I PISTON RING PLIERS.

APPUCATION FILED OCT. I6. i913.

. Patented Oct. 19, 1915.

. AM3/0mm;

rnviTEn STATES PATENT oEErcE.l A

DONALD J. CAMPBELL, or MUSKEGON HEIGHTS, MICHIGAN.

PIsToN-EINGTLIEES.

Specification ofLetters Patent.

' Application l'ed October 16, 1913. Serial No. 795,593.

['0 all what?. t may concern.'

Be it known that I, DONALD'J. CAMPBELL, a. 'citien of the United States of America,

residing at Muskegon Heights, in the county of Muskegon and Stateof Michigan, have invented certain new and. useful Improve- 'ments in Piston-Ring Pliers; and I do hereplacing piston rings, and to provide the same with various new and useful featuresV hereinafter more fully described and particularly pointed out in the claims, reference being had to the accompanying drawings representing an embodiment ofV my invention, in which Figure l is a perspective view of a device embodying my invention with a piston ring held thereby; Fig. 2 an enlarged detail of one of the jawsof the device; Fig. 3 an elevation of the jaws of the same; Fig. 4 a plan view somewhat enlarged, of the jaws arranged as shown in Fig. 1; Fig. 5 a diagrammatic view of a ,portion of the device engaged with a ring before expanding the same; Fig. 6 the same with the ring -eX- panded; andFig. 7 the same as Fig. 6, with the deviceadjusted for a wider ring.

Like numbers refer to like parts in all of the figures. y

.l represents a pair of handles for manually operating the device. These handles are divided .at 2 and oppositely prolonged from the pivot to form a pair of jaws which do not cross each other but swing apart as the handles are forced toward each other.n Each jaw is provided with a lng 4 on its end adjacent to the inner surface of the jaw and beveled to fit the beveled end of the ring where the same is cut apart.v lOn each jaw is mounted a flexible stop plate extending opposite the lug and adapted to engage Patented Oct. 19, 1915.

the respective upper and lower sides of the ring which terminate in acute angles; These spring stops normally arespaced apart from the luv toad-apt the device to the wider piston ring as indicated in Fig. 7, andl are adjusted closer to the lugs by thumb screws 6 for the narrower rings as in Figs. 5-and 6.

The type of ring for which this device is adapted is shown at 7, which is a singleintegral ring of resilient material severed diagonally to the axis, the endswhere so severed being normally spaced apart, as in;v .dicated in'Fig. 5, a sulicient distance to receive the lugs '-L therebetween when the same are brught close together Vby swinging the handles l away from each other.

In operation, when the lugs are placed between the severed ends of the ring and lsprung apart the acute angles of the ring will engage between the lug and the stop and lbv forcing the jaws apart the ring may' y be sprung apartor expanded lsufliciently to 'be placed upon a piston or removed therefrom, and when so expanded the ring can be carried by the tool to any desired place.

IVhat I claim isz- 1. Piston ring pliers, `vcomprising a pair of jaws movable toward and away from each other, lugs on the ends of the jaws and at adjacent sides thereof, and-adjustable stops adjacent to the lugs to engage the side' of the ring.

inclined lugs on the ends of the jaws andatl adjacent sides of the same stops opposite 80 2. Piston ringpliers, comprising a pairv the llugs to engage opposite 'sides of lthe ring, and screws to adjust the stops toward and away from the lugs.

, vInltestimony whereof I aiix my signature in presence of two witnesses.

DONALD J. CAMPBELL.

Witnesses:

PALMER A. JONES, MAE PANKIN. 

